I've lately had a problem (I use Win 7) with some GOTDs not starting the setup, once connected to the GOTD site - erroring out with the message such and such tmp file 'is not accessible as it is in use with another process'.
I've tried the obvious, ie turning off anti-malware programs, turning off the firewall but the problem persists. I can't see what process might be accessing tmp files from GOTD. :(
Any ideas out there please?